An anniversary is not a standard event: it calls for extra preparation because everything is personal and bespoke. Rough timeline:
12 months in advance: define the concept, reserve the venue, set the budget. 9 months: invitation copy, programme outline, select suppliers. 6 months: final programme, send invitations, book catering. 3 months: finalise details, draw up the timeline, prepare copy and presentations. 4–6 weeks: final check-in with all suppliers, last-minute adjustments. 1 week: technical rehearsal moments, briefings for the team.
Start early. The best venues, performers and photographers are booked up first.